Calcolatrice del cerchio
Conosci una misura del cerchio? Inseriscila per ottenere raggio, diametro, circonferenza e area.
Risultato
Inserisci i valori e premi Calcola per vedere il risultato.
Formula
Circumference is the distance around the circle.
Area is the space inside the circle.
Come usare questa calcolatrice
- Choose which measurement you know and enter it.
- Press Calculate. Exact answers are given in terms of π, with decimals underneath.
Esempio svolto
A circle with radius 5
Diameter = 2 × 5 = 10.
Circumference = 2π × 5 = 10π ≈ 31.415927. Area = π × 5² = 25π ≈ 78.539816.
Domande frequenti
Why is the answer written with π?
π is irrational, so “25π” is the exact answer. The decimal below it is rounded.
What units should I use?
Any unit works. Lengths come out in the same unit; area comes out in that unit squared.